Method of aligning scroll compressor components

A scroll compressor comprising:

• a first scroll member having a base and a generally spiral wrap extending from said base;
• a second scroll member having a base and a generally spiral wrap extending from its base, a shaft for driving said second scroll member to orbit relative to said first scroll member;
• a crankcase for supporting said second scroll member, said crankcase having an outer peripheral surface of a predetermined outer diameter, said outer peripheral surface of said crankcase being machined to be concentric with a bearing bore found at a central axis of said crankcase, said bearing bore receiving an upper bearing;
• a housing enclosing said shaft and said first and second scroll members and said crankcase, said housing including a center shell and upper and lower end caps;
• said lower end cap mounting a lower bearing for supporting a lower end of said shaft and said bearing bore in said crankcase mounting an upper bearing for supporting an upper end of said shaft;
• said lower bearing having a bearing axis which is cut to be concentric and parallel relative to an outer peripheral surface on said lower end cap, and said outer peripheral surface of said lower end cap being concentric with an inner peripheral surface of said center shell, and said outer peripheral surface of said crankcase being concentric with said inner peripheral surface of said center shell such that said upper and lower bearings are concentric with regard to each other.